refactor: remove unused imports and mark unused parameters

移除了未使用的导入和标记未使用的参数：
- auto-ssl-setup.ts: 移除未使用的 crypto 导入
- user-crypto.ts: 移除未使用的 users 导入
- user-data-import.ts: 移除未使用的 nanoid 导入
- simple-db-ops.ts: 标记未使用的 userId 和 tableName 参数

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/backend/utils/auto-ssl-setup.ts

@@ -1,7 +1,6 @@
 import { execSync } from "child_process";
 import { promises as fs } from "fs";
 import path from "path";
-import crypto from "crypto";
 import { systemLogger } from "./logger.js";
 
 export class AutoSSLSetup {

src/backend/utils/simple-db-ops.ts

@@ -127,7 +127,7 @@ class SimpleDBOps {
     table: SQLiteTable<any>,
     tableName: TableName,
     where: any,
-    userId: string,
+    _userId: string,
   ): Promise<any[]> {
     const result = await getDb().delete(table).where(where).returning();
 
@@ -146,7 +146,7 @@ class SimpleDBOps {
 
   static async selectEncrypted(
     query: any,
-    tableName: TableName,
+    _tableName: TableName,
   ): Promise<any[]> {
     const results = await query;
 

src/backend/utils/user-crypto.ts

@@ -1,6 +1,6 @@
 import crypto from "crypto";
 import { getDb } from "../database/db/index.js";
-import { settings, users } from "../database/db/schema.js";
+import { settings } from "../database/db/schema.js";
 import { eq } from "drizzle-orm";
 import { databaseLogger } from "./logger.js";
 

src/backend/utils/user-data-import.ts

@@ -12,7 +12,6 @@ import { eq, and } from "drizzle-orm";
 import { DataCrypto } from "./data-crypto.js";
 import { UserDataExport, type UserExportData } from "./user-data-export.js";
 import { databaseLogger } from "./logger.js";
-import { nanoid } from "nanoid";
 
 interface ImportOptions {
   replaceExisting?: boolean;